-1945domain: ZAppears in sequencesFirst differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 115", based on the 5-celled von Neumann neighborhood.at n=23A270184Expansion of Product_{k>=0} 1/(1 + x^(3*k+1))^(3*k+1).at n=26A285286